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Old 01-17-2014, 09:58 AM   #16
dee0007
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Quote:
Originally Posted by ac_2007 View Post
1) Unplug MAF, try starting and see how it drives. Your car will run rich while its unplugged (more fuel)

2) Change fuel filter. If you haven't already, by your mileage you're OVERDUE.

3) Add 2 bottles of Chevron Techron (BMW fuel system cleaner)

4) Check Fuel Pump pressure.

5) Check injectors (Although Techron should help)

6) Check coil packs/sparkplugs

Do it in that order, the first items are free/needed anyways.
Yesterday I tried starting the car and it didn't want to start right away. I Stopped and unplugged the MAF and still the car did not start right away, does this mean that the MAF is not the problem in my case?

And I did recently change the fuel filter.
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Old 01-17-2014, 09:59 AM   #17
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How can I check fuel pump pressure.
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Old 01-20-2014, 08:23 AM   #18
cheapthrills
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There is a schrader valve on the fuel rail. See if Partsource has a fuel pressure gauge to rent.
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Old 01-20-2014, 08:38 AM   #19
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Starting issue

I just wrote this for another forum member with another no start issue but will pertain to your vehicle as well:

You need to have the issue diagnosed properly, there are numerous components on your car that could cause a no start and you need to narrow down what it is.
Have you checked for fuel pressure, have you confirmed the vehicle has spark? Without performing these simple checks you have no real world way of finding a solution or narrowing down which component requires replacing/repair. Are all the parts you purchased brand new (I have experienced OEM BMW parts being faulty from new, it happens) I am not trying to harp on you but don't be afraid to pay someone for there expertise and knowledge (dealership/BMW specialty shop). Everyone always says they can't afford the diagnostic time (but don't have issues paying to throw parts at the car in hopes it's the solution they are looking for) Or try to educate yourself if not interested in paying someone, there is a lot of useful information both here on Maxbimmer and the internet in general on what tests to perform and how to do them without fancy computerized diagnostic equipment. Hope this helps and best of luck with your car! Check Maxbimmer list of sponsors for a reputable shop in your area.
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Old 02-17-2014, 12:18 PM   #20
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I have the same issue but it happens only once every like 3 months... really weird.


1. It has been happening ever since a few years ago the VANOS was replaced by some guy who i don't think did the timing right.

2. It happens only when i go to start the car, and it doesn't start correctly (maybe i didn't hold the key long enough to crank it) then i have to pretty much try to crank it for about a good 10-15 seconds as it picks up in sound that its close to turning on while holding gas.

3. A bunch of smoke comes out and rough smell from that, i have to hold the gas at a high rpm or the car will shut off. If it does i have to repeat but it starts in about 5-6 seconds the second time, and then the car works fine after that.. lol
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Old 02-17-2014, 12:52 PM   #21
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Quote:
Originally Posted by AlpWhitE46 View Post
I have the same issue but it happens only once every like 3 months... really weird.


1. It has been happening ever since a few years ago the VANOS was replaced by some guy who i don't think did the timing right.

2. It happens only when i go to start the car, and it doesn't start correctly (maybe i didn't hold the key long enough to crank it) then i have to pretty much try to crank it for about a good 10-15 seconds as it picks up in sound that its close to turning on while holding gas.

3. A bunch of smoke comes out and rough smell from that, i have to hold the gas at a high rpm or the car will shut off. If it does i have to repeat but it starts in about 5-6 seconds the second time, and then the car works fine after that.. lol
That would be the car running rich...at the first unsuccessful start it gets flooded with too much gas. It can even be so flooded that it will never start, happened to me on an X3 last week. Did everthing to it, even clean the spark plugs but nothing untill we actually replaced them, and it started first crank!
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Old 02-17-2014, 06:54 PM   #22
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Hmm ok i should look into doing my spark plugs then
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